ui: Tone down the preview highlight by adding a new scope

helix-term/src/ui/picker.rs

@@ -153,7 +153,10 @@ fn render(&mut self, area: Rect, surface: &mut Surface, cx: &mut Context) {
                         (end.saturating_sub(start) as u16 + 1)
                             .min(inner.height.saturating_sub(offset)),
                     ),
-                    cx.editor.theme.get("ui.selection"),
+                    cx.editor
+                        .theme
+                        .try_get("ui.highlight")
+                        .unwrap_or_else(|| cx.editor.theme.get("ui.selection")),
                 );
             }
         }

theme.toml

@@ -51,6 +51,7 @@ module = "#ff0000"
 "ui.cursor.insert" = { bg = "white" }
 "ui.cursor.match" = { fg = "#212121", bg = "#6C6999" }
 "ui.cursor" = { modifiers = ["reversed"] }
+"ui.highlight" = { bg = "bossanova" }
 
 "ui.menu.selected" = { fg = "revolver", bg = "white" }